Earphones; Megaphones; Pagers; Smartglasses; Telescopes; Call bells; Carrying cases for radio pagers; Data cables; Electric door bells; Electrified fences; Meat thermometers; Paging apparatus; Paging equipment; Punched card machines for offices; Radio pagers; Radio receivers; Radio receivers and transmitters; Radio transceivers; Radio transmitters and receivers; Smart watches; Telescopic riflescopes; Wearable activity trackers; Wireless indoor and outdoor speakers